Intrinsic and external active sites of single-atom catalysts

Active components with suitable supports are the common paradigm for industrial catalysis, and the catalytic activity usually increases with minimizing the active component size, generating a new frontier in catalysis, single-atom catalysts (SACs). However, further improvement of SACs activity is li...

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Bibliographic Details
Published in:iScience 2023-07, Vol.26 (7), p.107275-107275, Article 107275
Main Authors: Yao, Xue, Halpren, Ethan, Liu, Ye Zhou, Shan, Chung Hsuan, Chen, Zhi Wen, Chen, Li Xin, Singh, Chandra Veer
Format: Article
Language:English
Subjects:
Catalysis
Chemistry
Materials science
Review
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Summary:Active components with suitable supports are the common paradigm for industrial catalysis, and the catalytic activity usually increases with minimizing the active component size, generating a new frontier in catalysis, single-atom catalysts (SACs). However, further improvement of SACs activity is limited by the relatively low loading of single atoms (SAs, which are heteroatoms for most SACs, i.e., external active sites) because of the highly favorable aggregation of single heteroatoms during preparation. Research interest should be shifted to investigate SACs with intrinsic SAs, which could circumvent the aggregation of external SAs and consequently increase the SAs loading while maintaining them individual to further improve the activity. In this review, SACs with external or intrinsic SAs are discussed and, at last, the perspectives and challenges for obtaining high-loading SACs with intrinsic SAs are outlined. [Display omitted] Chemistry; Catalysis; Materials science.
ISSN:2589-0042
2589-0042
DOI:10.1016/j.isci.2023.107275